US 11,981,005 B2
Driving tool
Shun Kuriki, Anjo (JP); Masaya Nagao, Anjo (JP); Kiyonobu Yoshikane, Anjo (JP); and Toshiro Hirayama, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Sep. 27, 2022, as Appl. No. 17/953,420.
Claims priority of application No. 2021-174426 (JP), filed on Oct. 26, 2021.
Prior Publication US 2023/0125450 A1, Apr. 27, 2023
Int. Cl. B25C 1/04 (2006.01); B25C 1/06 (2006.01)
CPC B25C 1/047 (2013.01) [B25C 1/06 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A driving tool, comprising:
a piston configured to move in a driving direction due to a gas pressure;
a driver configured to move integrally with the piston in the driving direction to strike a fastener; and
a lifter mechanism configured to move the driver in a direction opposite to the driving direction, wherein:
the lifter mechanism includes:
an electric motor;
a final-stage planetary gear mechanism (i) configured to reduce an output speed of the electric; motor and (ii) including a carrier;
a rotary shaft (1) that is a separate component from the carrier, (ii) coupled to the carrier, (iii) configured to be rotated by the electric; motor and (iv) having an axis of rotation;
a bearing (i) configured to rotatably support the rotary shaft and (ii) at an outer circumference of the carrier; and
a wheel supported by the rotary shaft and configured to engage the driver;
one end of the rotary shaft is in the carrier such that the rotary shaft extends from the carrier in only one direction along the axis of rotation; and
the one end of the rotary shaft, the carrier and the bearing overlap in a radial direction from the axis of the rotation.